Model: 8668-8-4

Check Valve

Special Features:

Hinge pin material nickel-copper alloy; bolted bonnet

Properties:

Flow Control Device
Disk
Disk Loading Method
Weight
Renewable Seat Ring Type
Threaded
Bolt Hole Quantity
8 all ends
Maximum Operating Temp
366.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Mounting Position
Horizontal
Valve Size
8.000 inches
Maximum Operating Pressure
150.0 pounds per square inch 1st response
Maximum Operating Pressure
225.0 pounds per square inch 2nd response
Outside Diameter
13.500 inches all ends
Face To Face Distance
19.500 inches
Thickness
0.938 inches all ends
Bolt Hole Diameter
0.875 inches all ends
Bolt Circle Diameter
11.750 inches all ends
Flange Face Design
Plain all ends
Material
Copper alloy 836 body
Material
Copper alloy 836 flow control device
Material
Nickel alloy seat
Material Specification
Astm b61 or b62 assn standard single material response body
Material Specification
Astm b61 or b62 assn standard single material response flow control device
Material Specification
Qq-n-233, comp b federal specification single material response seat
Media For Which Designed
Steam 1st response
Media For Which Designed
Water-oil-gas 2nd response
Style Designator
Straight through flanged ends
Supplementary Features
Swing type
Nondefinitive Specification/std Data
8 in size and a group and 3 type and a style and 3 trim and 150 class
NSN
4820-00-148-0087
Part Number
8668-8-4
Description
Valve,check
CAGE
79342

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Part 8668-8-4 NSN 4820-00-148-0087

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05487
FIIG:
A530B0
Concept No.:
1
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
265.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481301090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of copper having a pressure rating of 850 kpa or over

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